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SpaceX uses robot dog to inspect Starship after first engine test in months

Starship S20's first engine test - not a static fire fire but still a show. (NASASpaceflight - bocachicagal)

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4 years ago

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SpaceX’s first orbital-class Starship prototype has survived the first of several expected Raptor tests, kicking off an engine test campaign that could mark a number of new milestones.

With just 20 minutes left in a seven-hour test window, Starship prototype S20 (Ship 20) appeared to either unsuccessfully attempt its first Raptor static fire test or complete its first intentional Raptor preburner test around 11:40 pm CDT (UTC-5) on Monday, October 18th. Rather than a violent jolt and roar kicking up a cloud of dust, Ship 20 came to life with a (relatively) gentle fireball that lasted for several seconds.

In pursuit of maximum efficiency, Starship’s Raptors require two separate closed-cycle gas generators known as preburners to – as the name suggests – turn its cryogenic (very cold) liquid oxygen and methane propellant into a hot gas mixture that the engine re-ignites to produce thrust. A preburner test, if that’s what Starship S20 completed on Monday night, thus involves activating only the first half of that equation, rapidly producing a giant cloud of flammable gas without actually igniting to produce meaningful thrust.

Preburner tests have become increasingly rare as SpaceX’s sea-level Raptor design matured over the course of tens of thousands of seconds of ground testing and, later, thousands of seconds of ground and flight testing on Starship prototypes. Starship S20 had two engines during its first test. One Raptor was the sea-level optimized variant SpaceX has built dozens of and fired for 30,000+ seconds on the ground. The other, however, was a vacuum-optimized Raptor with a much larger nozzle – the first of its kind to participate in any kind of test while installed on a Starship prototype.

It’s possible that Raptor Vacuum (RVac) engines have even more design tweaks outside of their larger expansion nozzles. Regardless, SpaceX has only built and tested around 10 RVac prototypes over the last year, making it a less mature engine than its sea-level cousins. That could explain why SpaceX appears to have chosen to perform a preburner test first instead of jumping straight into a wet dress rehearsal and static fire. That also means that October 18th’s test was likely the first time a Raptor Vacuum engine has (partially) ignited while installed on a Starship.

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This view from a LabPadre beach camera all but guarantees that RVac and RVac alone fired up its preburner as part of Ship 20’s first engine test.

The above view from a uniquely situated LabPadre camera all but guarantees that Starship S20’s first engine test was a Raptor Vacuum preburner test and doesn’t offer any strong evidence that it was a two-engine test. Ship 20 still has a number of crucial tests ahead of it before SpaceX can even begin to consider it (or its general design) qualified for flight. That includes multiple static fires, including the first side-by-side static fire of two Raptor variants (RVac and Raptor Center), the first simultaneous static fire of more than three engines, and the first Starship static fire with a full six engines installed.

Ship 20’s preburner test is SpaceX’s first Starbase Raptor test since the first Super Heavy booster static fire in mid-July, almost exactly three months ago.

One of at least two Starbase Spot robots – nicknamed Zeus – and his doghouse. (NASASpaceflight – bocachicagal)

With any luck, S20’s first preburner test has opened the door for an inaugural static fire of one or both installed engines later this week. However, during that preburner test, the giant fireball Raptor Vacuum emitted appeared to ignite several pieces of pad hardware. SpaceX took advantage of one of at least two Boston Dynamics Spot robots on-site to physically walk a camera up to the active pad and inspect several secondary fires. Ultimately, SpaceX appears to have successfully safed Starship with no damage to the vehicle itself, but odds are good that the sources of those secondary fires will need to be fixed and any pad damage repaired before Ship 20 proceeds into static fire testing. SpaceX has two more 5pm-12am test windows scheduled on October 19th and 20th.

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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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Tesla launches new Model S and Model X, and the changes are slim

Tesla’s newest versions of its flagship vehicles have arrived with some slim changes.

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12 hours ago

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June 12, 2025

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Credit: Tesla

Tesla has officially launched the newest versions of its flagship Model S and Model X vehicles, but the changes are pretty slim, which is something we expected when a couple cars were spotted during public testing recently.

The new “refreshed” Model S and Model X were spotted recently by The Kilowatts, and the changes appeared to be a new front camera, a new color, and only a handful of other changes.

Tesla officially announced the launch of the Model S and Model X on Thursday night, and here’s what it listed as the changes to the two vehicles:

  • Frost Blue paint color
  • Up to 410 miles of range (Model S Long Range – our longest range Tesla yet)
  • Even quieter inside: less wind + road noise & more effective Active Noise Cancellation
  • New wheel designs & improved aerodynamics = more range
  • Front fascia camera for better visibility
  • Dynamic ambient lighting that brings unique animations along the dash & doors upon entry
  • An even smoother ride thanks to new bushings & suspension design
  • Adaptive driving beams
  • New exterior styling for Model S Plaid, optimized for high-speed stability
  • More space for 3rd row occupants & cargo (Model X)

We expected most of these changes, especially the new Frost Blue paint color, as it was spotted by The Kilowatts in its initial coverage of the cars being spotted a few weeks back. Here’s what it looks like officially:

Some of the changes are familiar from the Model Y Refresh, which featured the quieter interior through acoustic-lined glass, a front fascia camera, new bushings, and suspension improvements for a smoother ride.

However, Tesla did refine the Model S Plaid’s exterior for “optimized high-speed stability.” You can see the difference between the two below:

The front-end air diffusers are much deeper, and the front end is more boxy than the previous iteration of the Plaid Model S.

Here are some more images of the Model S that Tesla released in a teaser video:

Tesla sells such a low volume of the Model S and Model X that it was probably less than likely that the company would put endless manpower and effort into completely redesigning it. CEO Elon Musk said a few years ago that the two cars would only stay in production for “sentimental reasons.” 

While they are very special to the Tesla family, they are not incredibly important to the mission of the company.

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Elon Musk

Tesla owners across the globe prepare for Robotaxi launch with this neat customization

Tesla will eventually have Robotaxis worldwide. Some owners are already preparing.

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12 hours ago

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June 12, 2025

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Credit: @HanChulYong | X

Tesla owners are already preparing for the company’s launch of the Robotaxi platform with a new, neat customization that is appearing around the world.

On Tuesday, the first Tesla Robotaxi test mule was spotted in Austin, where the company will launch the first driverless rides of this ride-hailing service. At first, it will be a limited rollout, reserved for a select few. CEO Elon Musk said public rides could occur as soon as June 22.

First Tesla driverless robotaxi spotted in the wild in Austin, TX

However, the Tesla Robotaxi platform is not one that will be confined to cities and geofenced to certain areas.

Eventually, Tesla will gain enough confidence to roll the Full Self-Driving software straight to every car in the customer fleet that paid for it. Owners will be able to generate income for themselves while they sleep, as the cars will operate as ride-hailing vehicles for people to use for transportation.

In an effort to prepare for the launch of Robotaxi, Tesla owners across the globe are installing Tesla’s ‘Robotaxi’ word art on their cars.

Here’s one in South Korea:

Here’s another in the U.S.:

Obviously, this is more of a symbol of support for the Robotaxi launch, but many owners are recognizing that Tesla’s Full Self-Driving software will extend to them the ability to use their personal cars as ride-hailing vehicles, becoming a part of the global fleet of self-driving chauffeurs.

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Elon Musk

Tesla sues former Optimus engineer for stealing trade secrets

Tesla is suing a former engineer who worked on Optimus after he left and immediately started a robotics company that achieved quick development of a hand.

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20 hours ago

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June 12, 2025

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Credit: Elon Musk | X

Tesla is suing former Optimus engineer Jay Li in federal court after accusing him of stealing trade secrets and using them to enable a startup he founded after he left.

Li is accused of stealing confidential files and using them to help get his company, “Proception,” off to a rocking start. Tesla says the files Li took helped his new startup “shortcut the typical development process” for robot hands, something that took Tesla years to develop and evolve.

The company said in the complaint (via Reuters):

“Through Li’s pilfering, Defendant Proception purportedly achieved in a matter of months what it has taken Tesla over four years, hundreds of employees, and billions of dollars to achieve.”

Li was an employee at Tesla for several years, working on the Optimus sensor team from 2022 to 2024. The company says it utilized and devoted “extraordinary resources” to the development of Optimus, which has come a long way since its unveiling several years ago.

Tesla Optimus to receive hands with 22 degrees of freedom later this year

Li allegedly downloaded confidential files related to Optimus’ robotic hand movement research before departing the company. He did not work on the hands at the time. However, he left and swiftly started Proception, as the suit states the company was founded just six days after he left Tesla.

Proception was gloating about its ability to build robotic hands just five months after the company was founded. Tesla says the hands have “striking similarities” to its own design for Optimus.

The company is looking for monetary damages and a court order that would block Proception from misusing the secrets it accuses Li of taking.

This is not the first suit Tesla has filed over trade secrets and confidential information theft. Recently, it accused German-Canadian dual citizen Klaus Pflugbeil of stealing battery-related secrets. He was arrested and sentenced to two years in prison.

Men accused of selling Tesla battery secrets arrested in undercover sting

The U.S. Department of Justice used an undercover sting to arrest Pflugbeil.

Tesla is being represented by Josh Krevitt, Orin Snyder, and Angelique Kaounis of Gibson Dunn & Crutcher.

The case is Tesla Inc. v. Perception Inc., U.S. District Court for the Northern District of California, No. 5:25-cv-04963.

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